In many cities of China, if an ambulance is_______ in a traffic jam, police will respond to the emergency.
| A．held up | B．held back |
| C．held down | D．held out |
Is it always easier ____ friends than to keep them?
| A．making | B．make | C．to make | D．made |
They were made ____ fourteen hours a day.
| A．work | B．working | C．worked | D．to work |
Why not ____?
| A．let him to go home | B．to let him go home |
| C．let him go home | D．to let him to go home |
The headmaster’s words are quite _____.
| A．encouraged | B．encouragement | C．encouraging | D．encourage |
--Do you often hear John ___ in his room? --Yes. Listen! Now we can hear him ___ in his room.
| A．sing; to sing | B．singing; singing | C．sing; singing | D．to sing; singing |